Abstract: A system that uses capsules or micro-capsules containing a dye or indicator embedded in a polymer matrix to indicate or measure the degradation of structural materials. The capsules can contain an agent that will be transparent or not detected when the capsule is intact. When the capsule is ruptured, the agent will be either visible to the human eye or measurable by other detection methods. The indicator can either activate upon release or be already activated but not readily visible or detectable in the capsule. An activator compound also can be distributed in the bulk material matrix that activates the indicator upon release. For totally opaque materials like concrete or metal, a surface coating or applied tape containing the capsules can be used.

Abstract: A stationary exercise bicycle is provided having a frame, a resistance member, a drive assembly, a right pedal, a left pedal, a seat and an adjustable seat mechanism utilizing a rack. Assembly and disassembly of a three piece crank arm assembly is accomplished without requiring the assembling and disassembling of the entire drive assembly. The stationary exercise bicycle also provides a variety of users with an optimum seat position and with a convenient latch mechanism to adjust the position of the seat.

Abstract: A stationary exercise bicycle is provided having a frame, a resistance member, a drive assembly, a right pedal, a left pedal, a seat and an adjustable seat mechanism utilizing a rack. Assembly and disassembly of a three piece crank arm assembly is accomplished without requiring the assembling and disassembling of the entire drive assembly. The stationary exercise bicycle also provides a variety of users with an optimum seat position and with a convenient latch mechanism to adjust the position of the seat.

Abstract: A stationary exercise bicycle is provided having a frame, a resistance member, a drive assembly, a right pedal, a left pedal, a seat and an adjustable seat mechanism utilizing a rack. Assembly and disassembly of a three piece crank arm assembly is accomplished without requiring the assembling and disassembling of the entire drive assembly. The stationary exercise bicycle also provides a variety of users with an optimum seat position and with a convenient latch mechanism to adjust the position of the seat.

Abstract: A stationary exercise bicycle is provided having a frame, a resistance member, a drive assembly, a right pedal, a left pedal, a seat and an adjustable seat mechanism utilizing a rack. Assembly and disassembly of a three piece crank arm assembly is accomplished without requiring the assembling and disassembling of the entire drive assembly. The stationary exercise bicycle also provides a variety of users with an optimum seat position and with a convenient latch mechanism to adjust the position of the seat.